body {
    background: #DDD;
}

#masonry {
    margin-top: 10px;
}

.content {
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'Segoe UI';
    font-size:50px;
    color: #fff;
    text-shadow: #000 2px 2px 0px;
    box-shadow: #00000033 0px 0px 0px 10px inset;
}

#masonry {
    display: grid;
    grid-gap: 10px;
    grid-template-columns: repeat(auto-fill, 150px);
    grid-auto-rows: 0;
    justify-content: center;
}